Block-cutter.



UNITED STATES PATENT OEFicE.

DONALD c. Ross, or BEAvERToN,.ivuoi-IIGAN.

BLOCK-CUTTER.

SPEGIFICATION'forming part of Letters Patent No. 650,192, dated May 22, 1900.

Application filed December 30. 1899. Serial No. 742,050. (No model.) I

T0 all whom, it may concern:

Be it known that I, DONALD G. ROSS, a citizen of the United States, residingat Beaverton, in the county of Gladwin aud Stateof Michigan,have invented certain new and useful Improvements in Block-Cutters, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to machines for cutting blocks, and especially designed for removing the sap-wood from paving-blocks such as shown in'prior patentissued to me January 22, 1884, No. 292,365. Said previous construction comprises a suitable frame, a reciprocating head or slide, a table, and a series of annular stationary cutters thereon for the blocks, the arrangement being such that the blocks may be forced against said cutters by the reciprocation of the head, the bodyof the block passing through the center of the cutter and the surrounding portion passing outside thereof. As the blocks to be cut are of various sizes, the cutters used are varied in size and are arranged from one side to the other of the table. In the use of the above- A described machine it has been found that the tion of my machine, and Fig. 2 is a crosssection thereof. Fig. 3 is aperspective view of one of the cutters.

A is a frame of any suitable construction, having arranged upon opposite sides thereof the vertical guides B, in which is slidingly secured the cross head or sash C. This crosshead comprises the side portion a, the upper cross-bar b, and the lower cross-bar c. Be-

tween the cross-bars Z) and c and upon opposite sides of the sash are arranged the crossbars d of the frame, and upon these are supported the bed D for carrying the cutters, which bed is of the following construction:

e are annular supports for the cutters, arranged in series and formed integral with an inverted-Vshaped bar f. The cross-section of this bar is preferably such as to form a comparati vely-sharp angle g at its upper edge between the annular bearin gs e, and in order to support said bar upon the cross-bar d without increasing its height I provide the winged portions 7L, of lesser pitch than the portion f. `The portions t are bolted or otherwise secured to the bars d, and the complete bed extends the full length between the bars a of the sash. The upper end of the bearing e is provided with shoulders or securing flanges t, with which the cu tter-ring E engages, the latter being preferably formed of steel. At the base of the frame are arranged the longitudinal bed-timbers j, upon which are secured bearings k for the parallel shafts F and G, extending across the frame. These shafts are preferably arranged in planes which are more than halfway from the center of the sash tothe outer edges thereof, as shown in Fig. l. Upon the shafts F and G are mounted, respectively, the gear-wheels H and I, and these gear-wheels mesh with two intermediate and intermeshing gear-wheels J and K. One of these intermediate gear-wheels is mounted upon the drive-shaft L, which is journaled in suitable bearings in the frame and is provided with a pulley M or other means for imparting rotary motion thereto. The shafts F and G are also provided with cranks Naud N', which I have shown as. secured to the gears I-I and I.

O and P are pitmen connected at their lower ,ends tothe cranks N and N' and at their upper ends to the bar c of the sash.

The parts being constructed as shown and described, the operation is as follows: Motion IOO now places the blocks to the cut above the proper annular cutters, whereupon the reci procation of the sash will cause the bar b there; o f to press the body of the blocks through the center and the cut-off portion outside the cutter. This cut-0E portion will in the descent of the bar b be pressed against the sharp ridge g of the bar f, whichwill divide it in two and allow the separated halves to fall 0E to the side of the machine. It will be under stood that in this operation the division of the annular cut-olf portion-of the block, together with the inclined arran gement of the bed v prevents clogging of the machine,whic'h would occur if a fiat bed were used, as in my previ-V ous construction.` I would also call attention tothe fact that the opposite movement of the cranks N and N will cause the pitmen to oppose eachother in lateral thrust, and thus will relieveV the friction due to side thrust on thefguides B. Moreover, as the shafts F and G arearranged nearer the ends of the sash thanthe center thereof thefoperation ofthe l'end cutters will not tend to gradually skew thesash.

What I claim as my invention isl. In a blockcutting machine, the combination with a reciprocating cross-head of a series of separated annular cutters arranged inline with said cross-head and a supportingbed for said cutters having a sharp dividingridge therebetween for thepurpose described.

3. In a block-cutting machine, the combi- `nationwithfa reciprocating cross-h ead,vof a series of separated annularcutters arranged `in line with said cross-head, and the bed D having annular supports e for the cutters, the sharp dividing-ridge f between said, cutters and the inclined wings 7L for the purpose described.

In testimony whereof I atix my signature iin presence of two witnesses.

n DONALD G. ROSS.

Witnesses:

M. B. ODOGHERTY, H. C. SMITH. 

